Ooooh. That’s a good tip about the Debug Meta Data plugin, Priscilla. Thanks!
I installed that plugin and found a number of Discourse related meta data fields. Unfortunately, after adding the meta fields to the Yoast Duplicate Posts “Do not copy these fields” option at https://theputtytribe.com/wp-admin/options-general.php?page=duplicatepost and saving the settings, the linked Discourse forum post data is still getting duplicated.
Here’s what I put in the “Do not copy these fields” option:
publish_post_category,publish_to_discourse,update_discourse_topic,discourse_post_id,discourse_topic_id,discourse_permalink,discourse_comments_count,discourse_comments_raw,discourse_last_sync,wpdc_sync_post_comments,wpdc_auto_publish_overridden
I’m not expecting you to do anything more. I’m just doing some documentation so anyone else who has the same issue knows what I’ve tried and knows what I’m doing – asking the Discourse devs if they can help in some way.